3.3.2. Autonomics

Question 1

Name the andrenergic receptor that increases heart contractility, automaticity, and conduction velocity

Answer 1

Beta 1

Question 2

Name the andrenergic receptor that increases arteriolar constriction and venoconstriction

Answer 2

Alpha 1

Question 3

Name the andrenergic receptor(s) that increases arterioloar dilation and venodilation

Answer 3

Beta 2 for arteriolar dilation in skeletal muscle and liver. D1 for arteriolar dilation in kidney and mesentary. Beta 2 for venodilation

Question 4

Name the andrenergic receptor contributing to bronchiole dilation

Answer 4

Beta 2

Question 5

Name the andrenergic receptor contributing to radial muscle contraction (mydriasis: pupil dilation)

Answer 5

Alpha 1

Question 6

Name the andrenergic receptor contributing to decreased GI tract and urinary bladder motility

Answer 6

Beta 2

Question 7

Name the andrenergic receptor contributing to GI tract and bladder sphincter contraction

Answer 7

Alpha 1

Question 8

Name the andrenergic receptor contributing to uterine relaxation

Answer 8

Beta 2

Question 9

Name the andrenergic receptor contributing to liver gluconeogenesis, glycogenolysis (increased glucose level in the blood)

Answer 9

Alpha 1 and Beta 2

Question 10

Name the andrenergic receptor contributing to increased lipolysis of adipose tissue (increased FA in blood)

Answer 10

Beta 1 and Beta 3

Question 11

Name the andrenergic receptor contributing to decreased insulin secretion

Answer 11

Alpha 2 (this is a sympathetic response to allow more glucose for the brain and skeletal muscle)

Question 12

Name the andrenergic receptor contributing to renin secretion

Answer 12

Beta 1

Question 13

List the effects of low dose epinephrine on HR, BP, and TPR

Answer 13

1. HR increases due to b1 activation
2. BP systolic increases due to increased HR. Diastolic decreases due to decreased TPR
3. TPR decreases. b2 has more of an effect than a1 at low dose, so vasodilation occurs and TPR decreases. The reverse effect occurs at high dose.
   * Recall, epi activates a1, a2, b1, b2, b3

Question 14

List the effects of norepinephrine on HR, BP, and TPR

Answer 14

1. HR initially increases due to b1, but quickly decreases due to vagal response of M2.
2. BP systolic increases due to b1. Diastolic increases due to a1.
3. TPR inreases due to a1.
   * Recall, norepi activates a1, a2, b1

Question 15

List effects of dopamine on HR, BP, and TPR

Answer 15

1. HR increases slightly due to b1
2. systolic BP increases due to b1. Diastolic BP decreases due to d1 lowering TPR (D1>a1)
3. TPR dereases due to D1 > a1
   * Recall, DA activates (D1, b1>a1)